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introduction：In machine building，It is common to determine the reamer diameter tolerance according to the dimensional accuracy of the hole to be machined。The diameter tolerance of the reamer to the dimensional accuracy of the hole to be machined、Both the manufacturing cost and the service life of the reamer have a direct impact。For this purpose，We are based on practical experience．The method of determining diameter tolerance of reamer is summarized，Introduce as follows。Suppose that the upper deviation and lower deviation of the hole of the machined part are respectivelyESandEI，The upper and lower deviations of the diameter of the reamer are respectivelyesandei。 the： es=(ES-EI) E
2015-01-14 Reading quantity 2913
introduction：The main causes of rust are as follows： 1、Some enterprises are producing bearings[bearing:bearing（“Bearing”，Japanese person“Axial receptor”）It is a part that holds and reduces the friction coefficient of load during mechanical transmission。Can also be said，When other parts move relative to each other on the shaft，A device used to reduce the coefficient of friction during power transmission and to keep the center of the shaft fixed。]In the process, the bearing parts in the processing process and the finished bearing after assembly are not strictly treated according to the requirements of the cleaning anti-rust regulations and the oil seal anti-rust packaging。Such as the ring in the turnover process turnover
2015-01-14 Reading quantity 1557
introduction： Lubricating pairFAGbearing[FAGbearing:The main shaft bearing is made of a solid inner ring、Outer ring、The ball、And a single row angular contact ball bearing consisting of a cage assembly with a solid window cage。]The life span has an important effect，Therefore, we must apply the correct lubrication maintenance method。 1、Oil bath lubrication Oil bath lubricationFAGbearing[FAGbearing:The main shaft bearing is made of a solid inner ring、Outer ring、The ball、And a single row angular contact ball bearing consisting of a cage assembly with a solid window cage。]Ordinary lubrication method，Low fit、Moderate speedFAGbearing[FAGshaft
2015-01-14 Reading quantity 1476
introduction：The lubrication parts of gear reducers can be divided into two categories in principle，One is the internal parts where the oil is in direct contact with the compression，Such as reciprocating gear reducer cylinder、piston、Piston ring、Piston rod、Exhaust valve、Sealing filler；Air chamber of rotary gear reducer、rotor(Solid of revolution)、Exhaust valve, etc。The second is the external transmission mechanism that the oil does not contact with the compression，Such as reciprocating gear reducer crankcase parts、Crank pin、Crank bearing[bearing:bearing（“Bearing”，Japanese person“Axial receptor”）It is a part that holds and reduces the friction coefficient of load during mechanical transmission。Can also be said，When other machinery in the shaft
2015-01-14 Reading quantity 2912
introduction： Change the main movement speed of the machine tool(As spindle speed﹑Table reciprocating stroke per minute, etc)The institution of。It can be individually mounted in a box to form a part of the machine tool﹐It can also be co-installed with other institutions in a box﹐For example, when it is installed with the spindle component, it is called the spindle gearbox。The method of speed change includes the realization of stepwise speed change by changing the combination of transmission parts and the use of mechanical﹑Hydraulic or electric mechanisms achieve stepless speed changes。 Machine tool spindle speed(Or some other primary motion speed)When the variable speed is graded﹐Rotational speed
2015-01-14 Reading quantity 2815
introduction：1.Is the outer packing clear：In ordinary circumstances，The factory brands have their own special preset positions for the implementation of external packaging presets，Moreover, factories with satisfactory production conditions shall be placed to manufacture and produce，Because this package is very clear from lines to color blocks，In no uncertain terms。 Whether the steel seal is clear：inFAGbearing[FAGbearing:The main shaft bearing is made of a solid inner ring、Outer ring、The ball、And a single row angular contact ball bearing consisting of a cage assembly with a solid window cage。]The brand will be printed on the body、Label etc。Very small font，However, most of the products produced by the factory use steel printing technology，And did not pass
2015-01-14 Reading quantity 1476
introduction： Rolling bearing[bearing:bearing（“Bearing”，Japanese person“Axial receptor”）It is a part that holds and reduces the friction coefficient of load during mechanical transmission。Can also be said，When other parts move relative to each other on the shaft，A device used to reduce the coefficient of friction during power transmission and to keep the center of the shaft fixed。]Types of、There are many types and sizes。To enable the mechanical device to perform the desired performance，Choosing the most suitable bearing is crucial。 For selected bearing，Many factors need to be analyzed，Research from all angles、Evaluate procedures for selecting bearings，unspecific
2015-01-14 Reading quantity 1557
introduction：Grease is made of a(Or more)Thickening agent and one(Or several)A plastic lubricant composed of lubricating fluids。 （one） Physical properties of greases Including appearance、Dropping point、Needle penetration、Colloidal stability、moisture、Mechanical impurities and evaporability, etc. 1、appearance：Include color、light、transparency、Fiber number、homogeneity、smell、Emulsifying property、Smoothness and softness。The meaning of appearance in use： 1）The quality of grease can be generally inferred by its appearance。homogeneity、hardness、soap-free、There are no mechanical impurities。 2）Preliminary identification
2015-01-14 Reading quantity 1568
introduction： 1.General requirement 1.1 Pneumatic valve specifications and categories，Shall comply with the requirements of the pipeline design document。 1.2 The model of the pneumatic valve should indicate the national standard number requirements based on。If enterprise standard，The relevant description of the model should be indicated。 1.3 Pneumatic valve working pressure，demand≥The working pressure of the pipe，Without affecting the price，The working pressure that the valve can withstand should be greater than the actual working pressure of the pipeline；Pneumatic valve closed condition on either side should be able to withstand1.1Double the valve working pressure value without leakage；With the valve open，The valve body shall bear
2015-01-14 Reading quantity 2890
introduction： Equipment maintenance，The dimensional chain principle is used to analyze the problem，It is helpful to solve the problem of position dimensional accuracy and position relation accuracy between interrelated surfaces，It is helpful to choose the appropriate repair method。 one、Definition of dimensional chain Mechanical equipment in the process of assembly or parts processing，A group of dimensions arranged sequentially between the surfaces or axes of a part，Closed form，The tolerance and limit deviation of one dimension are determined by the tolerance and limit deviation of other dimensions，Such a group of dimensions is called a dimension chain。If all the dimensions are on the same part，Its called a part dimension chain。If all feet
2015-01-14 Reading quantity 1450
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